New Madison STP
New Madison, OH · Darke County · Publicly Owned Treatment Works
- Average flow
- 0.08 MGD
- Design flow
- 0.15 MGD
- NPDES permit
- OH0040584
- Effective
- Permit expires
- May 2027
- Population served
- 994
- CWNS 2022
New Madison STP is a publicly owned wastewater treatment works in New Madison, Darke County, Ohio treating an average of 0.08 million gallons per day against a permitted design capacity of 0.15 MGD, serving about 994 residents. It discharges under NPDES permit OH0040584 (effective), which expires in May 2027, with 5 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 5
- Effluent violations
- 5
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at New Madison STP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Ohio
Eldorado · 5 mi away
0.02 MGD
West Manchester · 7 mi away
0.01 MGD
New Paris · 8 mi away
0.06 MGD
Arcanum · 9 mi away
0.18 MGD
Jefferson Twp. · 10 mi away
0.0055 MGD
Greenville · 11 mi away
1.19 MGD
Lewisburg · 13 mi away
0.17 MGD
Greenville · 16 mi away
0.0076 MGD
New Madison STP: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed September 11, 2026; facility record last updated November 29, 2025.